Abu
Sa'eed al-Khudri (R.A.) said that the Prophet
(Sallallaahu
Álayhi Wasallam) had once asked him if he had
water to wash. He said he gave the Prophet (Sallallaahu
Álayhi Wasallam) a
bucket of the well’s water

with
which he used to wash his head.(Picture
scanned from Nufoosh Paai Mustafaa)